/* 物理课堂交流室 · 坐标纸风格 */
:root {
  --paper: #f6f4ee;
  --grid: rgba(29, 53, 87, 0.055);
  --grid-major: rgba(29, 53, 87, 0.09);
  --panel: #ffffff;
  --panel-2: #fafaf7;
  --ink: #18212f;
  --ink-2: #3c4757;
  --muted: #6b7482;
  --line: #e3e0d8;
  --line-2: #eeebe4;
  --navy: #1d3557;
  --navy-2: #2a4a75;
  --navy-soft: #e8eef6;
  --coral: #e76f51;
  --coral-soft: #fdeee9;
  --teal: #2a9d8f;
  --teal-soft: #e3f4f1;
  --amber: #f4a261;
  --danger: #c0392b;
  --danger-soft: #fbeae8;
  --ok: #2a9d8f;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(24, 33, 47, 0.04), 0 8px 24px rgba(24, 33, 47, 0.06);
  --shadow-lg: 0 20px 60px rgba(24, 33, 47, 0.18);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; color: inherit; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.82rem; }
.center { text-align: center; }
.grow { flex: 1; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.35rem;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 0.62rem 1.05rem; cursor: pointer; font-weight: 600; white-space: nowrap;
  transition: background .15s, transform .05s, box-shadow .15s, opacity .15s;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--navy-2); }
.btn-accent { background: var(--coral); color: #fff; }
.btn-accent:hover:not(:disabled) { background: #d9603f; }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--ink-2); }
.btn-ghost:hover:not(:disabled) { background: var(--panel-2); border-color: #d3cfc5; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.36rem 0.7rem; font-size: 0.84rem; font-weight: 500; }
.btn-block { width: 100%; }
.link { color: var(--navy); font-weight: 600; text-decoration: none; background: none; border: 0; padding: 0; cursor: pointer; }
.link:hover { text-decoration: underline; }

/* ---------- 表单 ---------- */
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.68rem 0.85rem;
  background: #fff;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--navy-2); box-shadow: 0 0 0 3px rgba(42, 74, 117, 0.14); }
textarea { resize: none; line-height: 1.5; }
.field { margin-bottom: 0.9rem; }
.field label { display: block; margin-bottom: 0.35rem; font-size: 0.86rem; color: var(--ink-2); font-weight: 500; }
.check { display: flex; align-items: center; gap: 0.45rem; font-size: 0.86rem; color: var(--ink-2); margin-top: 0.55rem; cursor: pointer; }
.check input { width: auto; }
.hint { font-size: 0.84rem; color: var(--muted); margin: 1rem 0 0; }
.error {
  display: none; background: var(--danger-soft); color: var(--danger);
  border-radius: var(--radius-sm); padding: 0.6rem 0.8rem; margin-bottom: 0.9rem; font-size: 0.9rem;
}
.error.show { display: block; }

/* ---------- 登录 ---------- */
.login-wrap { min-height: 100%; display: grid; place-items: center; padding: 1.5rem; }
.login-card {
  width: min(400px, 100%); background: var(--panel); border: 1px solid var(--line);
  border-radius: 22px; box-shadow: var(--shadow-lg); padding: 2rem 1.75rem 1.5rem;
}
.login-mark { width: 56px; height: 56px; color: var(--navy); margin-bottom: 0.9rem; }
.login-mark .nucleus { color: var(--coral); fill: var(--coral); }
.login-mark svg { width: 100%; height: 100%; animation: spin 24s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.login-card h1 { margin: 0 0 0.3rem; font-size: 1.5rem; letter-spacing: 0.01em; }
.login-sub { margin: 0 0 1.4rem; color: var(--muted); font-size: 0.92rem; }

/* ---------- 顶栏 ---------- */
.app-shell { height: 100%; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
  padding: 0.7rem 1.25rem; background: var(--navy); color: #fff;
  box-shadow: 0 2px 12px rgba(29, 53, 87, 0.25); z-index: 5;
}
.brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; font-size: 1.05rem; min-width: 0; }
.brand span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.brand-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 4px rgba(231, 111, 81, 0.25); flex: none; }
.meta { display: flex; align-items: center; gap: 0.55rem; flex-wrap: nowrap; }
.meta .muted { color: rgba(255,255,255,0.65); }
.me { font-size: 0.88rem; color: rgba(255,255,255,0.9); white-space: nowrap; }
.topbar .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.3); }
.topbar .btn-ghost:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.5); }
.pill {
  display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.18rem 0.6rem; border-radius: 999px;
  font-size: 0.78rem; font-weight: 600; background: rgba(42, 157, 143, 0.22); color: #9ff0e4; white-space: nowrap;
}
.pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.pill.off { background: rgba(231, 111, 81, 0.25); color: #ffc2b2; }
.pill-ghost { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.85); }
.pill-ghost::before { background: #7ee0a1; }

/* ---------- 老师工具条 ---------- */
.teacher-bar {
  display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap;
  padding: 0.5rem 1.25rem; background: #fff8e8; border-bottom: 1px solid #f1e3bf; font-size: 0.85rem;
}
.tb-label { font-weight: 700; color: #8a6414; margin-right: 0.25rem; }
.tb-sep { flex: 1; }
.chip {
  border: 1px solid #e6d6ac; background: #fff; border-radius: 999px; padding: 0.25rem 0.75rem;
  cursor: pointer; font-size: 0.82rem; color: var(--ink-2); text-decoration: none; display: inline-flex; align-items: center; gap: 0.3rem;
}
.chip[data-toggle]::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #c9c3b6; }
.chip.on::before { background: var(--teal); }
.chip.on { border-color: #b6e0d9; }
.chip-solid { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ---------- 布局 ---------- */
.main {
  flex: 1; min-height: 0; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 1rem; padding: 1rem 1.25rem 1.25rem; max-width: 1360px; width: 100%; margin: 0 auto;
}
.panel {
  position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); display: flex; flex-direction: column; min-height: 0; overflow: hidden;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 0.8rem 1.1rem; border-bottom: 1px solid var(--line-2); }
.panel-head h2 { margin: 0; font-size: 0.98rem; }
.panel-body { flex: 1; min-height: 0; overflow: auto; padding: 1rem 1.1rem; scroll-behavior: smooth; }
.panel-foot { border-top: 1px solid var(--line-2); padding: 0.75rem; background: var(--panel-2); }

/* ---------- 聊天 ---------- */
.chat-list { display: flex; flex-direction: column; gap: 0.15rem; }
.msg { display: flex; flex-direction: column; align-items: flex-start; max-width: 86%; margin-top: 0.55rem; }
.msg.cont { margin-top: 0.1rem; }
.msg.cont .who { display: none; }
.msg .who { font-size: 0.76rem; color: var(--muted); margin: 0 0.4rem 0.2rem; display: flex; gap: 0.4rem; align-items: center; }
.msg .who b { color: var(--ink-2); font-weight: 600; }
.msg .text {
  background: #f1f0eb; padding: 0.55rem 0.8rem; border-radius: 14px 14px 14px 4px;
  white-space: pre-wrap; word-break: break-word; line-height: 1.55; position: relative;
}
.msg.mine { align-self: flex-end; align-items: flex-end; }
.msg.mine .text { background: var(--navy); color: #fff; border-radius: 14px 14px 4px 14px; }
.msg.teacher .text { background: #fff4d6; border: 1px solid #f0d78c; }
.msg.mine.teacher .text { background: #8a6414; color: #fff; border-color: #8a6414; }
.tag-teacher { background: var(--amber); color: #fff; font-size: 0.68rem; padding: 0.02rem 0.4rem; border-radius: 4px; font-weight: 700; }
.msg .del { opacity: 0; border: 0; background: none; color: var(--danger); cursor: pointer; font-size: 0.75rem; padding: 0; }
.msg:hover .del { opacity: 1; }
.day-sep { align-self: center; font-size: 0.74rem; color: var(--muted); background: var(--panel-2); border: 1px solid var(--line-2); padding: 0.1rem 0.6rem; border-radius: 999px; margin: 0.8rem 0 0.2rem; }
.new-msg {
  position: absolute; left: 50%; bottom: 84px; transform: translateX(-50%);
  background: var(--coral); color: #fff; border: 0; border-radius: 999px; padding: 0.4rem 0.9rem;
  box-shadow: var(--shadow); cursor: pointer; font-size: 0.84rem; z-index: 2;
}
.composer { display: flex; gap: 0.55rem; align-items: flex-end; }
.composer textarea { flex: 1; min-height: 44px; max-height: 160px; }
.composer .btn { height: 44px; }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 0.2rem; padding: 0.5rem 0.6rem 0; border-bottom: 1px solid var(--line-2); overflow-x: auto; }
.tab {
  background: none; border: 0; border-bottom: 2px solid transparent; padding: 0.55rem 0.75rem 0.6rem;
  color: var(--muted); cursor: pointer; font-weight: 600; font-size: 0.9rem; white-space: nowrap;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--navy); border-bottom-color: var(--coral); }

/* ---------- 文件 ---------- */
.file-row { display: flex; gap: 0.75rem; align-items: center; padding: 0.65rem 0.4rem; border-bottom: 1px solid var(--line-2); border-radius: 8px; }
.file-row:hover { background: var(--panel-2); }
.file-row:last-child { border-bottom: 0; }
.ficon {
  flex: none; width: 40px; height: 40px; border-radius: 9px; display: grid; place-items: center;
  font-size: 0.7rem; font-weight: 800; color: #fff; background: var(--navy-2); text-transform: uppercase; overflow: hidden;
}
.ficon img { width: 100%; height: 100%; object-fit: cover; cursor: zoom-in; }
.ficon.x-pdf { background: #c0392b; } .ficon.x-doc, .ficon.x-docx { background: #2b579a; }
.ficon.x-ppt, .ficon.x-pptx { background: #d24726; } .ficon.x-xls, .ficon.x-xlsx, .ficon.x-csv { background: #217346; }
.ficon.x-zip, .ficon.x-rar, .ficon.x-7z { background: #7a5c2e; } .ficon.x-txt, .ficon.x-md { background: #5c6673; }
.finfo { flex: 1; min-width: 0; }
.fname { font-weight: 600; color: var(--ink); text-decoration: none; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fname:hover { color: var(--navy); text-decoration: underline; }
.fmeta { color: var(--muted); font-size: 0.78rem; margin-top: 0.15rem; }
.factions { display: flex; gap: 0.3rem; flex: none; }
.dropzone {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.15rem;
  border: 1.5px dashed #cfcabd; border-radius: 12px; padding: 0.8rem; cursor: pointer; background: #fff; text-align: center;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.over { border-color: var(--navy-2); background: var(--navy-soft); }
.dropzone.disabled { opacity: 0.5; pointer-events: none; }
.dz-main { font-weight: 600; color: var(--navy); font-size: 0.92rem; }
.dz-sub { color: var(--muted); font-size: 0.76rem; }
.progress { position: relative; height: 26px; background: var(--line-2); border-radius: 8px; overflow: hidden; margin-top: 0.5rem; }
.progress .bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), #4cc3b4); transition: width .15s; }
.progress .ptext { position: absolute; inset: 0; display: grid; place-items: center; font-size: 0.78rem; font-weight: 600; }

/* ---------- 空状态 ---------- */
.empty { color: var(--muted); text-align: center; padding: 2.5rem 1rem; line-height: 1.8; font-size: 0.9rem; }
.empty-icon { font-size: 2rem; color: #c9c3b6; font-family: Georgia, serif; }

/* ---------- AI ---------- */
.ai-bubbles { display: flex; flex-direction: column; gap: 0.8rem; }
.bubble { border-radius: 14px; word-break: break-word; max-width: 100%; }
.bubble.user { align-self: flex-end; background: var(--navy-soft); color: var(--navy); padding: 0.55rem 0.85rem; white-space: pre-wrap; max-width: 88%; border-radius: 14px 14px 4px 14px; }
.bubble.bot { background: #fff; border: 1px solid var(--line); padding: 0.75rem 0.95rem; box-shadow: 0 1px 2px rgba(0,0,0,0.03); }
.bot-head { display: flex; align-items: center; gap: 0.4rem; font-size: 0.76rem; color: var(--muted); margin-bottom: 0.35rem; }
.bot-head .av { width: 18px; height: 18px; border-radius: 5px; background: var(--coral); color: #fff; display: grid; place-items: center; font-size: 0.7rem; font-weight: 800; }
.typing::after { content: "▍"; animation: blink 1s steps(1) infinite; color: var(--coral); margin-left: 1px; }
@keyframes blink { 50% { opacity: 0; } }
.thinking { color: var(--muted); font-size: 0.86rem; }
.thinking .dots span { animation: dot 1.2s infinite; display: inline-block; }
.thinking .dots span:nth-child(2) { animation-delay: .2s; } .thinking .dots span:nth-child(3) { animation-delay: .4s; }
@keyframes dot { 0%, 60%, 100% { transform: translateY(0); opacity: .4; } 30% { transform: translateY(-3px); opacity: 1; } }
details.reason { margin-bottom: 0.5rem; font-size: 0.82rem; color: var(--muted); }
details.reason summary { cursor: pointer; }
details.reason div { white-space: pre-wrap; border-left: 3px solid var(--line); padding-left: 0.6rem; margin-top: 0.3rem; max-height: 220px; overflow: auto; }

.md { line-height: 1.7; font-size: 0.94rem; }
.md > :first-child { margin-top: 0; } .md > :last-child { margin-bottom: 0; }
.md p { margin: 0.5em 0; }
.md h1, .md h2, .md h3, .md h4 { margin: 0.9em 0 0.4em; line-height: 1.35; }
.md h1 { font-size: 1.2rem; } .md h2 { font-size: 1.1rem; } .md h3 { font-size: 1rem; }
.md ul, .md ol { padding-left: 1.4em; margin: 0.4em 0; }
.md li { margin: 0.2em 0; }
.md blockquote { margin: 0.6em 0; padding: 0.2em 0.9em; border-left: 3px solid var(--coral); background: var(--coral-soft); border-radius: 0 8px 8px 0; color: var(--ink-2); }
.md code { font-family: var(--mono); font-size: 0.86em; background: #f1efe9; padding: 0.1em 0.35em; border-radius: 5px; }
.md pre { position: relative; background: #1b2433; color: #e6edf6; padding: 0.85rem 1rem; border-radius: 10px; overflow: auto; font-size: 0.84rem; line-height: 1.55; }
.md pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.md pre .copy-code { position: absolute; top: 6px; right: 6px; background: rgba(255,255,255,0.1); color: #e6edf6; border: 1px solid rgba(255,255,255,0.18); border-radius: 6px; font-size: 0.72rem; padding: 0.15rem 0.5rem; cursor: pointer; }
.md table { border-collapse: collapse; margin: 0.6em 0; font-size: 0.88rem; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 0.35em 0.7em; }
.md th { background: var(--panel-2); }
.md a { color: var(--navy); }
.md .katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.3em 0; }
.md hr { border: 0; border-top: 1px solid var(--line); margin: 1em 0; }

.bubble-actions { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.7rem; padding-top: 0.6rem; border-top: 1px dashed var(--line); }
.bubble-actions button { border: 1px solid var(--line); background: var(--panel-2); border-radius: 7px; font-size: 0.78rem; padding: 0.28rem 0.6rem; cursor: pointer; color: var(--ink-2); }
.bubble-actions button:hover { border-color: #cfcabd; background: #fff; }
.bubble-actions button.primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.ai-warn { margin-top: 0.5rem; font-size: 0.82rem; color: #b35a1f; background: #fff3e6; padding: 0.4rem 0.6rem; border-radius: 8px; }
.ai-err { color: var(--danger); }
.ai-toolbar { display: flex; align-items: center; gap: 0.4rem; margin-bottom: 0.55rem; }
.ai-toolbar select { width: auto; max-width: 55%; padding: 0.38rem 0.6rem; font-size: 0.85rem; }

/* ---------- 弹窗 / Toast ---------- */
.modal { position: fixed; inset: 0; background: rgba(17, 24, 39, 0.6); display: grid; place-items: center; z-index: 50; padding: 1rem; backdrop-filter: blur(3px); }
.modal-card { position: relative; background: #fff; border-radius: 20px; padding: 1.75rem; box-shadow: var(--shadow-lg); text-align: center; max-width: 92vw; }
.modal-x { position: absolute; top: 10px; right: 12px; border: 0; background: none; font-size: 1.6rem; line-height: 1; cursor: pointer; color: var(--muted); }
.modal-x.light { color: #fff; position: fixed; top: 14px; right: 20px; font-size: 2.2rem; }
.qr-card h3 { margin: 0 0 1rem; font-size: 1.4rem; }
.qr-box svg { width: min(360px, 70vw); height: auto; display: block; margin: 0 auto; }
.qr-url { font-family: var(--mono); font-size: 1.05rem; margin: 0.9rem 0 0.3rem; color: var(--navy); word-break: break-all; font-weight: 600; }
#imgModal img { max-width: 94vw; max-height: 90vh; border-radius: 10px; box-shadow: var(--shadow-lg); background: #fff; }
.toasts { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: 0.5rem; z-index: 60; pointer-events: none; width: max-content; max-width: 92vw; }
.toast { background: var(--ink); color: #fff; padding: 0.6rem 1rem; border-radius: 10px; box-shadow: var(--shadow-lg); font-size: 0.9rem; animation: tin .2s ease-out; }
.toast.err { background: var(--danger); } .toast.ok { background: var(--teal); }
@keyframes tin { from { opacity: 0; transform: translateY(-8px); } }

.mobile-nav { display: none; }

/* ---------- 手机 ---------- */
@media (max-width: 900px) {
  body { font-size: 15px; }
  .topbar { padding: 0.6rem 0.85rem; }
  .hide-sm, #closeHint { display: none; }
  .me { max-width: 7em; overflow: hidden; text-overflow: ellipsis; }
  .teacher-bar { padding: 0.45rem 0.85rem; }
  .main { grid-template-columns: 1fr; padding: 0.6rem 0.6rem calc(64px + env(safe-area-inset-bottom)); gap: 0; }
  .main[data-view="chat"] [data-pane="side"], .main[data-view="side"] [data-pane="chat"] { display: none; }
  .panel { border-radius: 14px; }
  .msg { max-width: 92%; }
  .new-msg { bottom: 78px; }
  .mobile-nav {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
    background: #fff; border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
  }
  .mobile-nav button { position: relative; flex: 1; border: 0; background: none; padding: 0.45rem 0 0.5rem; display: flex; flex-direction: column; align-items: center; gap: 0.05rem; font-size: 0.74rem; color: var(--muted); cursor: pointer; }
  .mobile-nav button span { font-size: 1.15rem; filter: grayscale(1); opacity: 0.7; }
  .mobile-nav button.active { color: var(--navy); font-weight: 700; }
  .mobile-nav button.active span { filter: none; opacity: 1; }
  .mobile-nav .dot { position: absolute; top: 6px; left: calc(50% + 10px); width: 8px; height: 8px; border-radius: 50%; background: var(--coral); }
}

/* ---------- 课堂结束页 / FAQ / 页脚 / 开始结束 ---------- */
.login-wrap { flex-direction: column; gap: 1rem; display: flex; align-items: center; justify-content: center; }
.closed-card { text-align: center; }
.closed-icon { font-size: 2.6rem; margin-bottom: 0.4rem; }
.closed-actions { display: flex; gap: 0.6rem; justify-content: center; }
.closed-actions .btn { text-decoration: none; }
.site-footer { margin: 0; text-align: center; font-size: 0.8rem; color: var(--muted); padding: 0 1rem; line-height: 1.6; }
.site-footer:empty { display: none; }
.site-footer.in-app { padding: 0 1rem 0.7rem; margin-top: -0.6rem; }
.faq-card { text-align: left; width: min(640px, 94vw); max-height: 86vh; display: flex; flex-direction: column; padding: 1.5rem 1.6rem 1.2rem; }
.faq-card h3 { margin: 0 0 0.8rem; font-size: 1.2rem; }
.faq-body { overflow: auto; flex: 1; padding-right: 0.3rem; }
.faq-foot { display: flex; justify-content: flex-end; margin-top: 0.9rem; }
.end-card { text-align: left; width: min(440px, 92vw); }
.end-card h3 { margin: 0 0 0.6rem; }
.end-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1.2rem; }
.chip-go { background: var(--teal); color: #fff; border-color: var(--teal); font-weight: 700; }
.chip-stop { background: var(--danger); color: #fff; border-color: var(--danger); font-weight: 700; }
.tb-div { width: 1px; height: 18px; background: #e6d6ac; margin: 0 0.2rem; }
.class-timer { font-variant-numeric: tabular-nums; }
@media (max-width: 900px) {
  .site-footer.in-app { display: none; }
  .meta [data-faq] { padding: 0.36rem 0.5rem; }
}